#!/bin/sh
# Execute a Java program.

# Copyright (C) 2001-2020 Free Software Foundation, Inc.
# Written by Bruno Haible <haible@clisp.cons.org>, 2001.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

# This uses the same choices as javaexec.c, but instead of relying on the
# environment settings at run time, it uses the environment variables
# present at configuration time.
#
# This is a separate shell script, because it must be able to unset JAVA_HOME
# in some cases, which a simple shell command cannot do.
#
# The extra CLASSPATH must have been set prior to calling this script.

CONF_JAVA='@CONF_JAVA@'
CONF_CLASSPATH='@CLASSPATH@'
if test -n "@HAVE_JAVA_ENVVAR@"; then
  # Combine given CLASSPATH and configured CLASSPATH.
  if test -n "$CLASSPATH"; then
    CLASSPATH="$CLASSPATH${CONF_CLASSPATH:+@CLASSPATH_SEPARATOR@$CONF_CLASSPATH}"
  else
    CLASSPATH="$CONF_CLASSPATH"
  fi
  export CLASSPATH
  test -z "$JAVA_VERBOSE" || echo "$CONF_JAVA $@"
  exec $CONF_JAVA "$@"
else
  unset JAVA_HOME
  export CLASSPATH
  if test -n "@HAVE_GIJ@"; then
    # In this case, $CONF_JAVA is "gij".
    test -z "$JAVA_VERBOSE" || echo "$CONF_JAVA $@"
    exec $CONF_JAVA "$@"
  else
    if test -n "@HAVE_JAVA@"; then
      # In this case, $CONF_JAVA is "java".
      test -z "$JAVA_VERBOSE" || echo "$CONF_JAVA $@"
      exec $CONF_JAVA "$@"
    else
      if test -n "@HAVE_JRE@"; then
        # In this case, $CONF_JAVA is "jre".
        test -z "$JAVA_VERBOSE" || echo "$CONF_JAVA $@"
        exec $CONF_JAVA "$@"
      else
        if test -n "@HAVE_JVIEW@"; then
          # In this case, $CONF_JAVA is "jview".
          test -z "$JAVA_VERBOSE" || echo "$CONF_JAVA $@"
          exec $CONF_JAVA "$@"
        else
          echo 'Java virtual machine not found, try installing gij or set $JAVA, then reconfigure' 1>&2
          exit 1
        fi
      fi
    fi
  fi
fi
